Lost

I have misplaced my flash drive (USB key) and therefore all the files on it. I am feeling terribly lost without it and don't really know what to do. There are so many places it could be and I haven't really had the time to look in any of them sufficiently. I may have lost it here at work or somewhere in our rather large (when compared to a flash drive) house. It went to Petawawa with me but I know I brought it back as I had to use it to return files to people around the office. Eek, I need my flash drive...I need the files that are on it...I don't know what to do without it.